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dc.contributor.authorDragomirová, Janettecs
dc.contributor.authorPalou, Martincs
dc.contributor.authorKuzielova, Evacs
dc.contributor.authorŽemlička, Matúšcs
dc.contributor.authorNovotný, Radoslavcs
dc.contributor.authorGméling, Katalincs
dc.date.accessioned2021-01-08T11:57:18Z
dc.date.available2021-01-08T11:57:18Z
dc.date.issued2020-09-17cs
dc.identifier.citationJournal of Thermal Analysis and Calorimetry. 2020, vol. 142, issue 1, p. 255-266.en
dc.identifier.issn1588-2926cs
dc.identifier.other165064cs
dc.identifier.urihttp://hdl.handle.net/11012/195815
dc.description.abstractThe present work investigates the hydration heat of different cement composites by means of conduction calorimetry to optimize the composition of binder in the design of heavyweight concrete as biological shielding. For this purpose, Portland cement CEM I 42.5 R was replaced by a different portion of supplementary cementitious materials (blast furnace slag, metakaolin, silica fume/limestone) at 75%, 65%, 60%, 55%, and 50% levels to obtain low hydration heat lower than 250 j g(-1). All ingredients were analyzed by energy dispersive X-ray fluorescence (EDXRF) and nuclear activation analysis (NAA) to assess the content of major elements and isotopes. A mixture of two high-density aggregates (barite and magnetite) was used to prepare three heavyweights concretes with compressive strength exceeding 45 MPa and bulk density ranging between 3400 and 3500 kg m(-3). After a short period of volume expansion (up to 4 h), a slight shrinkage (max. 0.3 degrees/degrees degrees) has been observed. Also, thermophysical properties (thermal conductivity, volumetric specific heat, thermal diffusivity) and other properties were determined. The results showed that aggregate content and not binder is the main factor influencing the engineering properties of heavyweight concretes.en
dc.formattextcs
dc.format.extent255-266cs
dc.format.mimetypeapplication/pdfcs
dc.language.isoencs
dc.publisherSpringercs
dc.relation.ispartofJournal of Thermal Analysis and Calorimetrycs
dc.relation.urihttps://link.springer.com/article/10.1007/s10973-020-09530-0cs
dc.rights(C) Springercs
dc.subjectCementitious compositesen
dc.subjectHydration heaten
dc.subjectHeavyweight concreteen
dc.subjectAggregatesen
dc.subjectRadioactive isotopeen
dc.subjectMechanical propertiesen
dc.subjectThermophysical propertiesen
dc.titleOptimization of cementitious composite for heavyweight concrete preparation using conduction calorimetryen
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. Ústav chemie materiálůcs
sync.item.dbidVAV-165064en
sync.item.dbtypeVAVen
sync.item.insts2021.01.08 12:57:17en
sync.item.modts2021.01.08 12:16:57en
dc.coverage.issue1cs
dc.coverage.volume142cs
dc.identifier.doi10.1007/s10973-020-09530-0cs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1588-2926/cs
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionacceptedVersionen


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